org.netbeans.mdr.persistence.btreeimpl.btreestorage
Class CachedPage

java.lang.Object
  org.netbeans.mdr.persistence.btreeimpl.btreestorage.IntrusiveList.Member
      org.netbeans.mdr.persistence.btreeimpl.btreestorage.CachedPage

public class CachedPage
extends IntrusiveList.Member

This represents a page fetched from the cache.

Field Summary

byte[]

contents the contents of the page

Method Summary

void	setWritable() Make this page writable.
java.lang.String	toString() format debugging info
void	unpin() client calls this when it is done with the page

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

contents

public byte[] contents

the contents of the page

Method Detail

setWritable

public void setWritable()
                 throws StorageException

Make this page writable. If it was not writable previously, this causes it to be logged. This must be called before the page is modified. If the cache is not currently in a transaction, this implicitly begins one.

Throws:

StorageException - I/O error logging the page

unpin

public void unpin()
           throws StorageException

client calls this when it is done with the page

Throws:

StorageException

toString

public java.lang.String toString()

format debugging info

Overrides:

toString in class java.lang.Object